The Leofoto LH-55 Low Profile Ball Head is a 55mm ball head that will support weight up to 50 lb. Crafted from aircraft grade aluminum and hard anodized, the LH-55 has all of the qualities you would expect from a professional-level head. An over-sized, ergonomic locking knob allows 45-degree tilting in all directions and dual 90-degree drop-notches facilitate quick and accurate switching from the horizontal landscape position to vertical portrait orientation. A separate tension knob is provided to apply the appropriate pressure that safely corresponds to the weight of your camera. A third knob loosens and locks the panning base which is laser-engraved with markers every 2.5 degrees from 0 to 360 degrees. Features: Ergonomic design gives superior handling and unsurpassed reliabilityLowest height profile in its classKnobs are captive and uniquely shaped, making operation very intuitiveDual 90-Degree drop-notches allow maximum flexibility for positioning the camera for portrait-orientation or extreme angle shotsMicrometer drag tension adjustment is repeatable and absolutely reliablePrecision panning base is finely laser-engraved at 2.5-degree intervals Laser-engraved millimeter scale offers precise centering and positioning within the clamp jawAll components are machined from solid aircraft aluminum and hard anodized for maximum durability and minimum weight Leofoto LH-55 55mm Low Profile Black Ball Head w/QP-70N QR Plate, Case, & Independent Pan Lock; Arca Compatible LH-55-QP-70N